Robert b



(No Model.)

B. B. GOODYEAR. STOP MOTION FOR KNITTING MACHINES.

Patented July 8,1890.

UNITED STATES.

PATENT OFFICE;

ROBERT B. GOODYEAR, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALFTO JAMES TAYLOR, OF SAME PLACE.

STOP-MOTION FOR KNITTING-MACHINES.-

SPECIFICATION forming part of Letters Patent No. 431,969, dated July 8,1890.

Application filed July 9, 1888.

To all whom it may concern:

Be it known that I, ROBERT E. GOODYEAR, of the city and county ofPhiladelphia, and State of Pennsylvania, have invented an Improvement inStop-Motions for Knitting-Vlachines, of which the following-is aspecification.

My invention relates to stop-motions for knitting-machines; and itconsists of certain improvements, which are fully set forth in thefollowing specification and shown in the accompanying drawings, whichform a part thereof.

It is the object of my invention to automatically stop the operation ofthe knitting-ma chine if at any time the thread should become broken orknotted. 1f the machine is not stopped instantly when this occurs, it isevi-, dent that the fabric knitted will be imperfect. To obviate thenecessity of constantly watchmg the yarn or thread and to automaticallyput the machine out of operation in case of breakage or knotting, myinvention is intended; and the result is accomplished by the mechanismshown in the drawings, in which-- Figure 1 is aplan view ofaknitting-machine having my invention applied thereto. Fig. 2 is aperspective View, on an enlarged scale, of the stop-motion mechanism;and Fig. 3 is a side elevation of the shifting mechanism to stop theknitting-machine My invention is adapted to other machines besidesknitting-machines where threads are fed to needles or other operatingparts for any desired purpose-for instance, in lacemaking machines,quilting machines, embroidery-m achines, &c.and where thebreakage of onethread necessitates the stoppage of the entire machine.

A is a knitting-head in an ordinary frame A. Bis the thread which passesthrough the stop-motion mechanism to the needles.

0 is an upright frame upon which the stopmotion mechanism operated bythe thread is located, and is bolted or otherwise secured to the mainframe A. J ournaled in arms on the upper part of this frame O is a shaftD, provided with a driving-wheel E, by which the shaft receives itsmotion from the main shaft of the machine through a band-connection orotherwise, as desired. Upon this shaft D is a Serial No. 279,410. (Nomodel.)

disk F, located between the arms in which the shaft is journaled andprovided with one or more pins f, projecting laterally from the sides ofthe disk. One pin fmay be used; but I prefer to use two, as thestop-motion mechanism is then more quickly operated.

G G are fixed thread-guides, preferably constructed of pieces of curvedwire extending from the sides of the frame O.

H H are levers pivoted to the frame 0, hav- 6o ing hooked or curved endsI 011 their shorter arms, which are adapted to fit over the fixedthread-guides G. These ends I constitute swinging thread-supports. Thelonger arms J of these levers H are bent upward at an angle, so thatnormally the weight of the longer arm J will throw it over against thedisk F.

K K are two arms loosely pivoted to the frame 0, provided with forkedends, through which the thread passes, located immediately beneath thefixed guides G. By these looselypivoted arms K K the mechanism isoperated to stop the rotation of the knitting-head when the thread isknotted, as is hereinafter more fully explained. 7 5

L is a bar loosely pivoted in the frame O and normally standing erectslightly below disk F and beyond the armsJ of the levers H.

M is an arm-extension of the bar L, extending outward from the frame O.

N is a wire or string connection between the arm M and the trip 0, toone arm of which it is secured. The trip is preferably in the form of anangular lever, pivoted at 0 to a trip supporting arm P, which isjournaled at p to the main frame A.

Q is a clutch or belt-shifter, upon which the trip-supporting arm Prests. This shifter is supportedin an uprightU of the main frame A, andis recessed in that portion immedigo ately below the trip-supporting armP. In this recess is a spring lock or catch R, which normally pressesagainst the side of the upright U.

T is a spring about the shifter Q, which 5 tends to throw it forward.The lock or catch R, however, prevents this by holding the shifter inplace.

q q are pins upon the shifter Q, between which the end of the Y-shapedlever W is held. This Y-shaped lever is adapted to opcrate a clutchmember X, loosely supported by a key or feather 'upon the power-shaft Q.

R is a wheel or hub having teeth or projections r on its periphery, andis carried on the shaft Q close to the trip 0. p

Z is a pulley loosely journaled on the powershaft and having a recessedpart 2, adapted to engage with the clutch member X.

i is a gear-wheel, by which the head A is rotated in the usual manner.

These details of the power-actuated knockoff mechanism, consisting ofthe trip and the mechanism operated by-it, are fullv set forth inLetters Patent No. 388,774, granted to me on the 28th day of August,1888, and my present invention is concerned merely with an improvementon the thread-actuated mechanism set out in that application, for whichthe present invention may be substituted; but the trip-actuated devicesare the same in both cases. The thread is brought up from the spool orbobbin through the forked end K of the lever K and thence over thecurved end I of the lever H and under the stationary thread-guide G, andthence to the needles.

The operation of the machine is as follows: The thread passing over thecurved end I and under the guide G holds the long arm J of the lever upand away from the pins f on disk F, as shown 011 the left hand of Fig.2. If the thread breaks, it will release the short end of the lever andallow the arm J to fall forward towardthe disk F. As this disk rotates,the pins f will then come in contact with the arm J and push it outwardagainst the pivoted bar L. The arm H is loosely pivoted to the frame 0,so as to allow it to be pushed outward in this manner, or when the arm His constructed of wire there will be sufficient flexibility for thispurpose. When the pivoted bar Lis pushed over, it will raise thearmextension M, and thereby operate the trip to bring the knitting-headto a standstill. The trip 0 will be raised by the arm-extension Mthrough its connection N to bring one arm of the trip within reach ofthe teeth 7" of the wheel or hub R. WVhen one of the teeth of this wheelR comes in contact with the trip 0, it will force the trip down and withit its supporting-arm P upon the spring lock or catch R, which will bepressed down and will unlock the shifter Q. This will then be shotforward through the forceof the spring T. The end of the lever WV willbe carried forward by the pins q q, and the clutch X will be disengagedfrom the pulley Z, and the machine will be immediately brought to rest.The broken part of the thread may be repaired and the machine startedagain into operation. The weight of the lever K is made to act upon thelever H, so as to assist in pre- Venting the thread being drawn out fromguide G and end I. of lever H. If the thread is knotted, the knot willbe caught between the wires of the forked arm K, and the tension of thethread upon the end or yarn support I of the lever H will be increasedsufficiently to deflect the lever until the thread will be released fromunder the guide G, which will immediately release the lever H and allowthe longer arm J to fall toward the disk F, when it will come in contactwith the pins f, and the machine will be stopped, as before. I prefer toemploy a pivoted lever K with the forked arm K, instead of a fixed arm,in order that the tension caused by the catching of the knot in theforked arm, while sufficient to deflect the thread support or arm I,will not be great enough to break the-thread, as might occur if thefixed arm were employed. The lever K in falling, after the thread hasbeen freed from lever H and guide G, strikes the lever H and causes itto positively move its end J into contact with the pins or projectionson the rotating disk. This makes the device doubly sure in operation.

In place of the clutch mechanism X and I lever W an ordinarybelt-shifter S may be used, as shown in dotted lines in Fig. 1. In thiscase Z will be a fixed pulley and an additional loose pulley Z will berequired.

The mere details of construction here shown are those preferred by me;but they are not to be considered limitations of my invention, as it isevident that they may be varied in many ways without departing from theprinciples of it.

Having 110w described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination of a rotating needlehead with a fixed guide,underwhich the thread is guided, a pivoted lever held by the thread passingunder said guide, a pivoted bar arranged in front of the long arm ofsaid pivoted lever, a rotating part adapted to force said long armagainst the pivoted bar to move it when the thread breaks, a tripactuated by the movement of said bar, a rotating part in connection withthe needle-head, having a projection or tooth adapted to strike saidtrip, and mechanism, substantially as described, actuated by the trip tostop the rotation of the needle-head.

2. The combination of a rotating needlehead with a fixed guide,underwhich the thread is guided, a pivoted lever held by the thread passingunder said guide, a pivoted bar arranged in front of the long arm ofsaid pivoted lever, a rotating part adapted to force said long armagainst the pivoted bar to IDOVG.

it when the thread breaks, a trip actuated by the movement of said bar,a rotating part in connection with the needle-head, having a projectionor tooth adapted to strike said trip, and mechanism operated by saidtrip, consisting of a movable bar, a spring to move said bar, a catch tohold said bar against the spring, a support for the trip adapted toactuate the catch, and devices actuated by the movable bar to stop therotation of the needle-head.

3. The'combination of a rotating needle headwith a fixed guide,underwhich the thread is guided, a pivoted lever held by the thread passingunder said guide, a pivoted bar arranged in front of the long arm ofsaid piw oted lever, a forked lever between the forks of which thethread passes under the fixed guide, a rotating part adapted to forcesaid long arm against the pivot-ed bar to move it, a trip actuated bythe movement of said bar, a rotating part in connection with theneedlehead, having a projection or tooth adapted to strike said trip,and mechanism, substantially as described, actuated by the trip to stopthe rotation of the needle-head.

4. The combination of a rotating needlehead, a thread-guide, under whichthe thread passes, a pivoted lever held by the thread and released bythe breaking of the thread, a pivoted bar arranged in front of saidlever, a rotating part adapted to push the lever when released from thethread against said bar to actuate the bar, and trip mechanism,substantially as described,controlled by said bar to stop the rotationof the needle-head.

5. The combination of a rotating needlehead, a thread-guide under whichthe thread passes, a pivoted lever held by the thread and released bythe breaking of the thread, a pivoted bar arranged in front of saidlever, a rotating part consisting of a disk provided with a projectionor pin adapted to push the lever when released from the thread againstsaid bar to actuate the bar, and trip mechanism, substantially asdescribed, controlled by said bar to stop the rotation of-theneedlehead.

6. The combination of a rotating needlehead, a thread-guide, under whichthe thread passes, a pivoted lever held by the thread, a pivoted bararranged in front of said lever, a forked lever located under thepivoted lever and threadguide, through the forked end of which thethread passes, a rotating part adapted to push the pivoted lever whenreleased by the thread against said bar to actuate it, and tripmechanism, substantially as described, controlled by said pivoted bar tostop the rotation of the needle-head.

7. The combination of a fixed thread-guide, under which the threadpasses, a pivoted thread-guide extending upon each side of the fixedguide and over which the thread passes, a stop-motion-controlling bar orarm actuated by the pivoted thread-guide, and a rotating projection toactuate the pivoted thread-guide when thrown out of normal action by thewithdrawal of the thread from said pivoted and fixed guide, and therebyimpart a positive action to the stop-motion-controlling bar or arm.

8. The combination of a fixed thread-guide, under which the threadpasses, a pivoted thread-guide extending upon each side of the fixedguide and over which the thread passes, a stop-motion controllin g baror arm actuated by the pivoted thread-guide, a second pivotedthread-guide having a slot open at one end for the thread, and arotating projection to actuate the pivoted threadguide when thrown outof normal action by the withdrawal of the thread from said pivoted andfixed guide,

and thereby impart a positive action to the stop-motion-controlling baror arm.

9. The combination of a fixed thread-guide, under which the threadpasses, a pivoted thread-guide extending upon each side of the fixedguide, and over which the thread passes, a stop-m otion-controlling baror arm actuated by the pivoted thread-guide, a second pivotedthread'gnide having a slot open at one end for the thread, and whichsaid second pivoted thread-guide is connected to the first-mentionedthread-guide, so as to counterweight it against the action of thethread, and a rotating projection to actuate the pivoted thread-guidewhen thrown out of normal action by the withdrawal of the thread fromsaid pivoted and fixed guide, and therebyimpart a positive action -tothe stop-motion-controlling bar or allll.

10. The combination of the needle-head A, power mechanism to rotate it,upright support, lever H, pivoted to said support, fixed thread-gnide G,shaft D, journaled in said support, disk F, having projections f,carried bysaid shaft, pivoted bar L, having short arm or extension M,trip 0, connection N between said short arm M and trip 0, andstop-motion mechanism, substantially as set out, controlled by said trip0 to stop the rotation of the needle-head when the thread breaks.

11. The combination of the needle-head A, power mechanism to rotate it,upright support, lever H, pivoted to said support, fixed thread-gnide G,shaft D, j ournaled in said support, disk F, having projections f,carried by said shaft, pivoted bar L, having short arm or extension M,lever K, having a forked end K, through which the thread passes, trip 0,connection N between said short arm M and trip 0, and stop-motionmechanism, substantially as set out, controlled by said trip 0 to stopthe rotation of the needle-head when the thread becomes knotted.

12. The combination of the needle-head A, power mechanism to rotate it,upright support, lever II, pivoted to said support, fixed thread-guideG, shaft D, journaled in said support, disk F, having projections f,carried by said shaft, pivoted bar L, having short arm or extension M,trip 0, connection N bet-ween said short arm M. and trip 0, pivotedtripsupport P, shaft Q, carrying toothed wheel R, adapted to operate thetrip 0, look R,

spring T, and shiftin g mechanism to stop the rotation of the shaft Qwhen the thread breaks.

13. The combination of athread-guide fixed against vertical movement, apivoted threadguide lever Vertically movable with respect to saidfirst-mentioned thread-guide and having one end adapted to hold andguide the thread in conjunction with the said first-men tionedthread-guide, a pivoted bar or arm adapted to be operated by the movablethreadguide, an actuating projection to strike said movable thread-guidewh n the thread is broken or removed, the said actuating projection andmovable thread-guide having movement one with relation to the other, andstopmotion mechanism actuated by the pivoted arm or bar when moved bythe movable thread-guide.

14. The combination of power-actuated knock-off mechanism with a lever,one arm of which engages with said knock-off mechanism, the other armforming a swinging thread-support, which releases the thread when unduetension is exerted thereupon and the lever is deflected.

ROBERT B. GOODYEAR.

Vitnesses:

E. M. BRECKINREID, ERNEST HOWARD HUNTER.

